2x+x+3+x=75

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Solution for 2x+x+3+x=75 equation:



2x+x+3+x=75
We move all terms to the left:
2x+x+3+x-(75)=0
We add all the numbers together, and all the variables
4x-72=0
We move all terms containing x to the left, all other terms to the right
4x=72
x=72/4
x=18

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